// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//
#pragma once

#include <pollux/exec/aggregate.h>

namespace kumo::pollux::functions::aggregate {
    /// Min and max functions in Presto and Spark have different semantics:
    /// 1. Nested NULLs are compared as values in Spark and as "unknown value" in
    /// Presto.
    /// 2. The timestamp type represents a time instant in microsecond precision in
    /// Spark, but millisecond precision in Presto.
    /// Parameters 'nullHandlingMode' and 'precision' allow to register min and max
    /// functions with different behaviors.
    exec::AggregateFunctionFactory getMinFunctionFactory(
        const std::string &name,
        CompareFlags::NullHandlingMode nullHandlingMode,
        TimestampPrecision precision);

    exec::AggregateFunctionFactory getMaxFunctionFactory(
        const std::string &name,
        CompareFlags::NullHandlingMode nullHandlingMode,
        TimestampPrecision precision);
} // namespace kumo::pollux::functions::aggregate
